29 U.S.C. § 1405: Limitation on withdrawal liability

a portion (determined under paragraph (2)) of the liquidation or dissolution value of the employer (determined after the sale or exchange of such assets), or in the case of a plan using the attributable method of allocating withdrawal liability, the unfunded vested benefits attributable to employees of the employer. For purposes of paragraph (1), the portion shall be determined in accordance with the following table: If the liquidation or distribution value of the employer after the sale or exchange is— The portion is— Not more than $5,000,000 30 percent of the amount. More than $5,000,000, but not more than $10,000,000 $1,500,000, plus 35 percent of the amount in excess of $5,000,000. More than $10,000,000, but not more than $15,000,000 $3,250,000, plus 40 percent of the amount in excess of $10,000,000. More than $15,000,000, but not more than $17,500,000 $5,250,000, plus 45 percent of the amount in excess of $15,000,000. More than $17,500,000, but not more than $20,000,000 $6,375,000, plus 50 percent of the amount in excess of $17,500,000. More than $20,000,000, but not more than $22,500,000 $7,625,000, plus 60 percent of the amount in excess of $20,000,000. More than $22,500,000, but not more than $25,000,000 $9,125,000, plus 70 percent of the amount in excess of $22,500,000. More than $25,000,000 $10,875,000, plus 80 percent of the amount in excess of $25,000,000. 50 percent of the unfunded vested benefits allocable to the employer (determined without regard to this section), and as of the commencement of liquidation or dissolution, and after reducing the liquidation or dissolution value of the employer by the amount determined under paragraph (1). To the extent that the withdrawal liability of an employer is attributable to his obligation to contribute to or under a plan as an individual (whether as a sole proprietor or as a member of a partnership), property which may be exempt from the estate under section 522 of title 11 or under similar provisions of law, shall not be subject to enforcement of such liability. an employer is insolvent if the liabilities of the employer, including withdrawal liability under the plan (determined without regard to subsection (b)), exceed the assets of the employer (determined as of the commencement of the liquidation or dissolution), and the liquidation or dissolution value of the employer shall be determined without regard to such withdrawal liability. all such withdrawals shall be treated as a single withdrawal for the purpose of applying this section, and the withdrawal liability of the employer to each plan shall be an amount which bears the same ratio to the present value of the withdrawal liability payments to all plans (after the application of the preceding provisions of this section) as the withdrawal liability of the employer to such plan (determined without regard to this section) bears to the withdrawal liability of the employer to all such plans (determined without regard to this section).